| 摘要 |
<p>PURPOSE:To facilitate maintenance and control, by providing an ultrafiltration membrane capable of separating activated sludge to an aeration tank having activated sludge. CONSTITUTION:The nutrient salt solution in a nutrient salt storage tank 5 is supplied to an aeration tank 1 along with choline or TMAH type waste water by a chemical liquid pump 6. Next, the activated sludge in the aeration tank 1 is sent to an ultrafiltration membrane 2 under pressure by a pump 3. The choline or TMAH type org. substance passes through concentrate return piping 4 to be returned to the aeration tank 1. By this method, activated sludge can be proliferated so as to bring the concn. thereof to a suitable value and waste water can be well treated.</p> |
